As a multi-element compound fertilizer, NPK fertilizer has a complex production process and requires extremely high particle uniformity. Drum screener machine, with their precise grading capabilities, are essential key equipment in NPK fertilizer production, serving multiple stages, including raw material pretreatment, semi-finished product processing, and finished product inspection.
During the raw material pretreatment stage, drum screener machine can pre-screen these raw materials, removing impurities or large lumps of raw material that exceed particle size standards. This ensures uniform particle size before mixing, laying a solid foundation for the subsequent granulation process and avoiding uneven granulation caused by varying raw material particle sizes.

During the semi-finished product processing stage, NPK fertilizer granulation produces particles of varying sizes, which require grading using a drum screener machine. The equipment accurately separates particles that meet standards, while simultaneously sending overly coarse particles to a crushing facility for reprocessing and returning overly fine powder to the granulation process for secondary use. This significantly improves raw material utilization and reduces waste.
During the finished product inspection stage, the secondary screening of finished fertilizer ensures that the particle size of each batch of NPK fertilizer meets industry standards and market demand.
Furthermore, the equipment’s continuous operation capability meets the needs of large-scale NPK fertilizer production, seamlessly integrating with the production line and avoiding production stoppages caused by interruptions in the screening process.